@article{duan_2017_laoduan,
    author  = {Duan},
    title   = {Lao Duan},
    year    = {2017},
    journal = {Journal of Duan},
    volume = {01},
    number = {01},
    month  = {01},
    pages  = {1-10},
},

@book{duan_2017_xiaoduan,
    author    = {Duan},
    title     = {Xiao Duan},
    edition   = {First Edition},
    publisher = {DuanJia},
    address   = {NanTianMen MenKou},
    year      = {2017},
}
